WO2024095169A1

WO2024095169A1 - Lid assembly and liquid heating container

Info

Publication number: WO2024095169A1
Application number: PCT/IB2023/060992
Authority: WO
Inventors: 刘华清; 舒再善
Original assignee: 浙江绍兴苏泊尔生活电器有限公司
Priority date: 2022-11-03
Filing date: 2023-11-01
Publication date: 2024-05-10

Abstract

A lid assembly, comprising: a lower lid (10), wherein at least two upwardly protruding overflow prevention columns (110) are provided on the lower lid (10), a hollow portion (111) is provided inside each overflow prevention column (110), a steam inlet (120) penetrating through the lower lid (10) is provided in each overflow prevention column (110), and the steam inlets (120) are in communication with the hollow portions (111); and anti-tipping valves (20), arranged in the hollow portions (111), wherein one of the outer side wall of each anti-tipping valve (20) and the inner side wall of each hollow portion (111) is provided with a threaded portion (210), the other is a smooth column, and a spiral channel is formed between the threaded portion (210) and the smooth column.

Description

Technical field of cover assembly and liquid heating container The present application relates to the technical field of household appliances, and specifically to a cover assembly and a liquid heating container. Background technology At present, in order to ensure the efficiency and heat preservation performance of boiling water, most of the lids of liquid heating containers on the market adopt a sealing structure. In order to avoid the danger of excessive pressure inside the kettle body caused by a large amount of water vapor generated when boiling water, an anti-dumping lid is designed to allow steam to be discharged smoothly. The anti-dumping lid can also prevent water from spraying out when the liquid heating container is tipped over. The existing anti-dumping lid generally includes at least two exhaust pipes and at least two steel balls, with many parts, complex structure, high processing cost of parts, and complex assembly process, which takes a long time. Summary of the invention The present application aims to solve at least one of the technical problems existing in the above-mentioned prior art or related art. To this end, the first aspect of the present application is to provide a cover assembly. The second aspect of the present application is to provide a liquid heating container. According to a first aspect of the present invention, a cover assembly is provided for covering the top opening of a container body of a liquid heating container, the cover assembly comprising: a lower cover, the lower cover having at least two anti-overflow columns protruding upward, a hollow portion is provided inside the anti-overflow column, and a steam inlet penetrating the lower cover is provided in each anti-overflow column, and the steam inlet is connected to the hollow portion; an anti-dumping valve is provided in the hollow portion, one of the outer side wall of the anti-dumping valve and the inner side wall of the hollow portion is provided with a threaded portion, and the other is a smooth column, and a spiral channel is formed between the threaded portion and the smooth column. The cover assembly proposed in the embodiment of this aspect, the lower cover is provided with an anti-overflow column, the anti-dumping valve is installed in the hollow portion of the anti-overflow column, and one of the outer side wall of the anti-dumping valve and the inner side wall of the hollow portion is provided with a threaded portion, and the other is a smooth column, and a spiral channel is formed between the threaded portion and the smooth column, and the spiral channel can play a role in exhausting steam, and And, it can also block the impact of water flow at the moment when the liquid heating container is tipped over, so as to effectively prevent the water in the container body from spilling out from the anti-dumping valve. Specifically, when the liquid heating container is in a normal state, the spiral channel can discharge the steam in the container body; when the liquid heating container is in a tipping state, one anti-dumping valve will enter the water, and the liquid can only pass through the spiral channel slowly, or even cannot pass through the spiral channel completely, preventing the liquid from flowing out of the cover assembly, while the other anti-dumping valve is higher than the liquid level, and the steam can be discharged from the spiral channel higher than the liquid level to relieve the pressure, so as to avoid the danger caused by the inability to discharge the steam inside the container body and excessive pressure, thereby meeting the needs of the liquid heating container in the anti-dumping state. Further, compared with the structure in which the anti-dumping pot cover generally includes at least two exhaust pipes and at least two steel balls in the related art, the technical solution of the present application can realize the anti-dumping function and normal exhaust function of the cover assembly only through the cooperation of the anti-dumping valve and the anti-overflow column, with fewer parts, greatly reducing the production cost, and also simplifying the assembly process of the cover assembly, improving the production efficiency. In addition, the cover assembly provided by the above-mentioned embodiment of the present application can also have the following additional technical features: In some embodiments, the range of the difference between the diameter of the threaded portion and the diameter of the smooth column is -0.5mm to 0.5mm. Within this range, the air tightness of the spiral channel formed by the threaded portion and the smooth column can be ensured, and the anti-dumping valve will not be difficult to install in the anti-overflow column due to the difference between the diameter of the threaded portion and the diameter of the smooth column being too small or too large, or the anti-dumping valve will be easily loosened and dropped when installed in the anti-overflow column. Specifically, this range includes three matching situations of the threaded portion and the smooth column. First, there is a gap between the threaded portion and the smooth column, and the single-side size of the gap is less than or equal to 0.25mm. The gap size is small, and the steam or water flowing out of the gap is very small and can be ignored. Most of the steam and water still need to flow out through the spiral channel, which can effectively prevent the water in the container body from spilling out from the anti-dumping valve. In addition, due to the small gap, the anti-dumping valve will not be easily loosened or dropped in the anti-overflow column; and if the gap value between the threaded portion and the smooth column is greater than 0.25mm, when the liquid heating container is tipped over, high-temperature water will be sprayed out of the spiral channel below. Second, the difference between the diameter of the threaded portion and the smooth column is 0mm. In this case, the threaded portion and the smooth column just fit together, which can ensure that the spiral channel has good steam discharge. And effectively prevent the water in the container body from spilling out from the anti-dump valve. Third, the threaded portion and the smooth column are interference fit, and the interference on one side is less than or equal to 0.25mm, which will not make it difficult to install the anti-dump valve into the anti-overflow column. If the interference on one side is greater than 0.25mm, the spiral channel will be too narrow, and the high-temperature gas in the liquid heating container cannot be discharged in time, which will cause safety risks. In some embodiments, a threaded portion is provided on the outer wall of the anti-dump valve, and the inner wall of the hollow portion is a smooth column. In this way, the threaded portion is provided on the outer wall of the anti-dump valve, and the inner wall of the hollow portion is a smooth column, which can simplify the structure of the mold and facilitate the injection molding of the lower cover. In some embodiments, the threaded portion includes a thread, and the thread is wound multiple times along the height direction of the anti-dump valve. Such arrangement makes the length of the threaded portion longer, and it is not easy to spill liquid. Specifically, when the liquid heating container is tipped over, the liquid in the container body will slowly pass through the spiral channel, thereby preventing the liquid from spilling as much as possible. In some embodiments, the threaded portion includes a plurality of threads, and the plurality of threads are arranged in parallel and wound multiple times along the height direction of the anti-dumping valve. Such arrangement makes the ventilation area of the spiral channel formed between the plurality of threads and the inner side wall of the hollow portion larger, and the speed of discharging steam is faster, so as to avoid the danger caused by excessive accumulation of steam inside the container body and inability to discharge and excessive pressure. In some embodiments, the cover assembly further includes: an anti-overflow valve plate, a safety air inlet, a safety air outlet and a safety channel connecting the safety air inlet and the safety air outlet provided on the anti-dumping valve, the safety air inlet is connected to the steam inlet, and the anti-overflow valve plate blocks the safety air outlet; wherein, when the pressure inside the container body is greater than the set threshold, the pressure can flush the anti-overflow valve plate. In these embodiments, when the pressure inside the liquid heating container is normal, the anti-overflow valve plate can prevent steam or liquid from passing directly through the safety air inlet, the safety channel, and the safety air outlet, so that the safety air outlet can be blocked when the liquid heating container is in a tilted state to prevent liquid from spilling; the safety air inlet, the safety channel, the safety air outlet, and the anti-overflow valve plate are set to prevent the gas pressure inside the container from being too high and causing hot water to spray out and injure people when all spiral channels are blocked. Specifically, when the pressure inside the liquid heating container exceeds the set threshold, the inside of the container body The steam can enter the insurance air inlet, insurance channel, insurance air outlet and flush the anti-overflow valve plate, so that the steam can be quickly discharged from the insurance outlet, avoiding the danger caused by the inability to discharge the steam inside the container body and excessive pressure. In some embodiments, a fixing part is provided at the top of the anti-dumping valve, and a matching part is provided on the anti-overflowing valve plate. The fixing part and the matching part cooperate with each other to connect the anti-overflowing valve plate to the top of the anti-dumping valve. In this way, the anti-overflowing valve plate and the top of the anti-dumping valve are connected through the fixing part and the matching part, so that the anti-overflowing valve plate is installed. In some embodiments, the fixing part is a hook, and the matching part is a hole. The hook passes through the hole and can hook the upper surface of the anti-overflowing valve plate, so that the anti-overflowing valve plate fits the upper surface of the anti-dumping valve. In this way, the hook and the hole are convenient for assembly and have good binding force, and are not easy to loosen. The hook and the hole are used in conjunction. Under normal use, the hook hooks the upper surface of the anti-overflow valve sheet so that the anti-overflow valve sheet fits on the surface of the anti-dumping valve and blocks the safety air outlet. Under abnormal conditions, under the action of the air pressure inside the container body, the anti-overflow valve sheet is forced to deform, the safety air outlet is opened, and the gas can be discharged from the safety air outlet to release pressure. In addition, after the pressure inside the container body returns to normal pressure, the shape of the anti-overflow valve sheet is restored, and the safety air outlet continues to be blocked, so that it can be used multiple times. In some embodiments, a protrusion protruding downward is provided on the bottom surface of the anti-dumping valve, and a gas guide port is provided on the side of the protrusion, and the gas guide port is connected to the steam inlet and the safety air inlet. In this way, the protrusion is located between the lower cover and the bottom surface of the anti-dump valve, which can play a role in supporting the anti-dump valve, preventing the bottom surface of the anti-dump valve from directly contacting the lower cover, resulting in the safety air inlet located on the bottom surface of the anti-dump valve being blocked; and the air guide port is arranged on the side of the protrusion to connect the steam inlet and the safety air inlet, which simplifies the structure and facilitates the arrangement. In some embodiments, the steam inlet and the safety air inlet are arranged in a horizontally staggered manner. In this way, when the liquid heating container is tipped over, the impact force of the water inside the container body will not directly act on the safety air inlet through the steam inlet, so that the anti-overflow valve sheet can be prevented from being opened due to the impact force generated by the shaking of the water at the moment when the liquid heating container is tipped over, thereby ensuring that the anti-overflow valve sheet can block the safety air outlet when the liquid heating container is in a tipped state to prevent liquid from spilling. In some embodiments, the steam inlet is located on the bottom wall of the hollow part away from the middle of the lower cover At one side edge of the center. This arrangement allows the steam inlet to be located as close to the outer peripheral edge of the lower cover as possible on the bottom wall of the hollow part, so that when the liquid heating container is in a dumped state, the anti-dumping valve located on the upper side can be in a higher position, thereby minimizing the risk of being submerged by water, and then being able to maintain the passage, ensuring that the steam can flow out of the spiral channel, avoiding the danger of the steam inside the container body being unable to be discharged and the pressure being too high, and further meeting the needs of the liquid heating container in the anti-dumping state. In some embodiments, the cover assembly also includes: a middle cover, connected to the top of the lower cover, the lower surface of the middle cover and the lower cover are enclosed to form an air guide channel, and the side walls of the lower cover and/or the middle cover are provided with a steam outlet connected to the outside, and the air guide channel connects the spiral channel and the steam outlet. In these embodiments, an air guide channel is formed by setting an anti-dumping valve, a lower cover, and a middle cover, and a steam outlet is set on the middle cover and/or the lower cover, so that the steam discharged from the spiral channel of the anti-dumping valve can flow directly to the steam outlet through the air guide channel, so that the steam can quickly reach the steam outlet, and then be discharged from the cover assembly from the steam outlet, reducing the time from boiling to the power switch tripping, and also reducing the contact surface of steam condensation, reducing the generation of condensed water inside the cover assembly. According to the second aspect of the present invention, a liquid heating container is provided, comprising: a container body, the top of the container body has an opening; and a cover assembly as any one of the above technical solutions, the cover assembly is covered at the opening. The liquid heating container provided in the embodiment of this aspect has the beneficial effects of any of the above technical solutions due to the cover assembly of any of the above technical solutions, which will not be repeated here. In some embodiments, the liquid heating container also includes a pouring port and a handle arranged oppositely, and a steam switch is arranged in the handle; the number of anti-dumping valves is two, and the two anti-dumping valves are symmetrically arranged along the line between the pouring port and the handle. In these embodiments, since the handle is used as a fulcrum when the liquid heating container is tipped, two anti-tip valves are symmetrically arranged on the line between the pouring port and the handle, so that no matter which direction the liquid heating container is tipped, one anti-tip valve will not be submerged by the water surface, so that the anti-tip valve located on the upper side maintains a passage, ensuring that steam can flow out of the spiral channel, avoiding the danger caused by the inability to discharge steam inside the container body and excessive pressure. Thereby, the requirements of the liquid heating container in the anti-dumping state are met. Further, a steam switch is provided in the handle, specifically, a container steam outlet is provided on the container body, the container steam outlet is connected with the steam outlet, and further connected to the inside of the handle, so that the steam in the cover assembly can flow into the handle through the steam outlet and the container steam outlet, condense in the handle or be discharged to the outside; further, the steam can trigger the steam switch under certain conditions, avoid abnormal operation of the liquid heating container, prevent dry burning and danger, and improve the safety of the product. Other aspects and/or advantages of the general concept of the present invention will be partially explained in the following description, and another part will be clear through the description, or can be known through the implementation of the general concept of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The above and other purposes and features of the present invention will become clearer through the following description of the embodiments in combination with the accompanying drawings. In the accompanying drawings: FIG1 is an exploded view of a cover assembly provided according to an embodiment of the present invention; FIG2 is a cross-sectional structural schematic diagram of a cover assembly provided according to an embodiment of the present invention; FIG3 is a cross-sectional structural schematic diagram of a cover assembly provided according to an embodiment of the present invention capable of showing an anti-dumping valve, in which the anti-overflow valve sheet is in a closed state; FIG4 is a cross-sectional structural schematic diagram of a cover assembly provided according to an embodiment of the present invention capable of showing an anti-dumping valve, in which the anti-overflow valve sheet is in an open state; FIG5 is another cross-sectional structural schematic diagram of a cover assembly provided according to an embodiment of the present invention capable of showing an anti-dumping valve, in which the anti-overflow valve sheet is in a closed state; FIG6 is another cross-sectional structural schematic diagram of a cover assembly provided according to an embodiment of the present invention capable of showing an anti-dumping valve, in which the anti-overflow valve sheet is in an open state; FIG7 is a top view schematic diagram of a partial structure of a cover assembly provided according to an embodiment of the present invention; FIG8 is a structural schematic diagram of a cover assembly provided according to an embodiment of the present invention in an inverted state; FIG9 is another cross-sectional structural schematic diagram of a partial structure of a cover assembly provided according to an embodiment of the present invention Figure 10 is a schematic diagram of the structure of the anti-dumping valve of the cover assembly provided according to an embodiment of the present invention; Figure 11 is a schematic diagram of the structure of the anti-dumping valve of the cover assembly provided according to an embodiment of the present invention in an inverted state. Explanation of the reference numerals of Figures 1 to 11:

10 lower cover, 110 anti-overflow column, 111 hollow part, 120 steam inlet,

20 anti-dumping valve, 210 threaded portion, 220 safety air inlet, 230 safety channel, 240 safety air outlet, 250 protrusion, 260 air guide port, 270 hook,

30 anti-overflow valve, 310 card hole,

40 middle cover, 410 steam outlet,

50 on the cover,

60 container body, 610 opening, 620 pouring spout, 630 container steam outlet. Specific embodiments The following specific embodiments are provided to help readers gain a comprehensive understanding of the methods, devices and/or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and/or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted. The features described herein can be implemented in different forms and should not be interpreted as being limited to the examples described herein. On the contrary, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices and/or systems described herein, which will be clear after understanding the disclosure of the present application. As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more. Although terms such as “first,” “second,” and “third” may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, and portions are not limited to the members, components, regions, layers, or portions. or part should not be limited by these terms. On the contrary, these terms are only used to distinguish one member, component, region, layer or part from another member, component, region, layer or part. Therefore, without departing from the teaching of the example, the first member, first component, first region, first layer or first part referred to in the example described herein may also be referred to as the second member, second component, second region, second layer or second part. In the specification, when an element such as a layer, region or substrate is described as "on" another element, "connected to" or "bonded to" another element, the element may be directly "on" another element, directly "connected to" or "bonded to" another element, or one or more other elements may be present in between. On the contrary, when an element is described as "directly on" another element, "directly connected to" or "directly bonded to" another element, there may be no other elements in between. The terms used herein are only used to describe various examples and will not be used to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprising", "including" and "having" indicate the existence of the described features, quantities, operations, components, elements and/or combinations thereof, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and/or combinations thereof. The term "plurality" represents any number of two and more than two. The definitions of the directional words "upper", "lower", "top" and "bottom" in this application are based on the orientation of the air fryer when it is in a normal use state and placed upright. Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as those generally understood by ordinary technicians in the field to which the present invention belongs after understanding the present invention. Unless explicitly defined as such herein, terms such as those defined in general dictionaries should be interpreted as having the same meaning as their meanings in the context of the relevant field and in the present invention, and should not be interpreted in an idealized or overly formal manner. In addition, in the description of the examples, when it is considered that the detailed description of the well-known related structure or function will cause an ambiguous interpretation of the present invention, such detailed description will be omitted. The following will describe the cover assembly and the liquid heating container of some embodiments of the present application in conjunction with Figures 1 to 11. As shown in Figures 1 to 8, an embodiment of the first aspect of the present invention provides a cover assembly and a liquid heating container. The body assembly is used to cover the top opening 610 of the container body 60 of the liquid heating container. The cover assembly includes: a lower cover 10, the lower cover 10 has at least two anti-overflow columns 110 protruding upward, the interior of the anti-overflow column 110 is provided with a hollow portion 111, and each anti-overflow column 110 is provided with a steam inlet 120 penetrating the lower cover 10, and the steam inlet 120 is connected to the hollow portion 111; an anti-dumping valve 20 is provided in the hollow portion 111, one of the outer side wall of the anti-dumping valve 20 and the inner side wall of the hollow portion 111 is provided with a threaded portion 210, and the other is a smooth column, and a spiral channel is formed between the threaded portion 210 and the smooth column. The cover assembly proposed in the embodiment of this aspect has an anti-overflow column 110 on the lower cover 10, and the anti-dumping valve 20 is installed in the hollow portion 111 of the anti-overflow column 110, and one of the outer wall of the anti-dumping valve 20 and the inner wall of the hollow portion 111 is provided with a threaded portion 210, and the other is a smooth column, and a spiral channel is formed between the threaded portion 210 and the smooth column, and the spiral channel can play a role in discharging steam, and can also block the impact of water flow at the moment when the liquid heating container is tipped over, thereby effectively preventing the water in the container body 60 from spilling out from the anti-dumping valve 20. Specifically, when the liquid heating container is in a normal state, the spiral channel can discharge the steam in the container body 60; when the liquid heating container is in a dumping state, an anti-dumping valve 20 will enter the water, and the liquid can only pass through the spiral channel slowly, or even cannot pass through the spiral channel completely, preventing the liquid from flowing out of the cover assembly, and the other anti-dumping valve 20 is higher than the liquid level, and the steam can be discharged from the spiral channel higher than the liquid level to relieve the pressure, so as to avoid the danger caused by the inability to discharge the steam inside the container body 60 and excessive pressure, thereby meeting the requirements of the liquid heating container in the anti-dumping state. Further, compared with the structure of the anti-dumping pot cover generally including at least two exhaust pipelines and at least two steel balls in the related art, the technical solution of the present application can realize the anti-dumping function of the cover assembly and the normal exhaust function only through the cooperation of the anti-dumping valve 20 and the anti-overflow column 110, with fewer parts, greatly reducing the production cost, and also simplifying the assembly process of the cover assembly, improving the production efficiency. In some embodiments, the difference between the diameter of the threaded portion 210 and the diameter of the smooth column ranges from -0.5 mm to 0.5 mm. Within this range, the air tightness of the spiral channel formed between the threaded portion 210 and the smooth column can be ensured, and the anti-dumping valve 20 will not be difficult to install in the anti-overflow column 110 due to the difference between the diameter of the threaded portion 210 and the diameter of the smooth column being too small or too large, or the anti-dumping valve 20 will not be easily loosened when installed in the anti-overflow column 110. movement, and falling. Specifically, this range includes three matching situations of the threaded portion 210 and the smooth column. First, there is a gap between the threaded portion 210 and the smooth column, and the single-side size of the gap is less than or equal to 0.25 mm. The gap size is small, and the steam or water flowing out of the gap is very small and can be ignored. Most of the steam and water still need to flow out through the spiral channel, so that the water in the container body 60 can be effectively prevented from spilling out from the anti-dumping valve 20. In addition, due to the small gap, the anti-dumping valve 20 will not be easily loosened or dropped in the anti-overflow column 110; and if the gap value between the threaded portion 210 and the smooth column is greater than 0.25 mm, when the liquid heating container is tipped over, high-temperature water will be sprayed out from the spiral channel located below. Second, the difference between the diameter of the threaded portion 210 and the smooth column is 0 mm. In this case, the threaded portion 210 fits the smooth column just right, which can ensure that the spiral channel has a good effect of discharging steam and effectively preventing the water in the container body 60 from spilling out from the anti-dumping valve 20. Third, the threaded portion 210 and the smooth column are interference-fitted, and the interference amount on one side is less than or equal to 0.25 mm, which will not cause the anti-dumping valve 20 to be difficult to install in the anti-overflow column 110, and if the interference amount on one side is greater than 0.25 mm, the spiral channel will be too narrow, and the high-temperature gas in the liquid heating container cannot be discharged in time, which will cause safety risks. In some embodiments, as shown in Figures 1 to 7, Figures 10 and 11, the outer wall of the anti-dumping valve 20 is provided with a threaded portion 210, and the inner wall of the hollow portion 111 is a smooth column. In this way, the threaded portion 210 is arranged on the outer side wall of the anti-dumping valve 20, and the inner side wall of the hollow portion 111 is a smooth column, which can simplify the structure of the mold and facilitate the injection molding of the lower cover 10. For the specific structure of the threaded portion 210, in some embodiments, as shown in Figures 1, 10 and 11, the threaded portion 210 includes a thread, and the thread is wound multiple times along the height direction of the anti-dumping valve 20. In this way, the length of the threaded portion 210 is long, and it is not easy to spill liquid. Specifically, when the liquid heating container is overturned, the liquid in the container body 60 will slowly pass through the spiral channel, thereby preventing the liquid from spilling as much as possible. For the specific structure of the threaded portion 210, in some embodiments, the threaded portion 210 includes a plurality of threads (not shown in the figure), and the plurality of threads are distributed in parallel and wound multiple times along the height direction of the anti-dumping valve 20. With such arrangement, the spiral passage formed between the multiple threads and the inner wall of the hollow portion 111 has a larger ventilation area, and the steam is discharged faster, thereby preventing excessive steam from accumulating inside the container body 60 and being unable to be discharged, resulting in excessive pressure and danger. In some embodiments, as shown in Figures 1, 3, 4, 5, 6 and 9, the cover assembly further includes: an anti-overflow valve sheet 30, a safety air inlet 220, a safety air outlet 240 and a safety channel 230 connecting the safety air inlet 220 and the safety air outlet 240 provided on the anti-dumping valve 20, the safety air inlet 220 is connected to the steam inlet 120, and the anti-overflow valve sheet 30 blocks the safety air outlet 240; wherein, when the pressure inside the container body 60 is greater than the set threshold, the pressure can open the anti-overflow valve sheet 30. In these embodiments, when the pressure inside the liquid heating container is normal, the anti-overflow valve sheet can inhibit steam or liquid from passing directly through the safety air inlet 220, the safety channel 230 and the safety air outlet 240, so that the safety air outlet 240 can be blocked when the liquid heating container is in a dumped state to prevent liquid from spilling; the safety air inlet 220, the safety channel 230, The setting of the safety air outlet 240 and the anti-overflow valve plate 30 is to prevent the gas pressure in the container body 60 from being too high and causing hot water to spray out and injure people when all spiral channels are blocked. Specifically, when the pressure inside the liquid heating container exceeds the set threshold, the steam inside the container body 60 can enter the safety air inlet 220, the safety channel 230, and the safety air outlet 240 and break the anti-overflow valve plate 30, so that the steam is quickly discharged from the safety outlet, avoiding the danger caused by the inability to discharge the steam inside the container body 60 and excessive pressure. In some embodiments, as an example, optionally, as shown in Figures 10 and 11, the safety air inlet 220 is located at the bottom of the anti-dumping valve 20, the safety air outlet 240 is located at the top of the anti-dumping valve 20, and the safety air inlet 220 and the safety air outlet 240 are arranged at the two ends of the anti-dumping valve 20, one below and one above, which is convenient for setting and makes the safety channel 230 linear, which is conducive to the smooth discharge of the safety channel 230. In some embodiments, as shown in FIG. 5, FIG. 10 and FIG. 11, a fixing portion is provided at the top of the anti-dump valve 20, and a matching portion is provided on the anti-overflow valve plate 30, and the fixing portion and the matching portion cooperate with each other to connect the anti-overflow valve plate 30 to the top of the anti-dump valve 20. In this way, the anti-overflow valve plate 30 and the top of the anti-dump valve 20 are connected through the fixing portion and the matching portion, thereby realizing the installation of the anti-overflow valve plate 30. Optionally, as an example, the fixing portion and the matching portion can be a combination of threaded holes and screws, or a combination of buckles and buckle positions, or a combination of hooks 270 and holes 310, all of which can play a connecting role. In some embodiments, as shown in FIG. 5, FIG. 10 and FIG. 11, the fixing portion is a hook. 270, the matching portion is a clamping hole 310, the clamping hook 270 passes through the clamping hole 310 and can hook the upper surface of the anti-overflow valve plate 30, so that the anti-overflow valve plate 30 is attached to the upper surface of the anti-dumping valve 20. With such arrangement, the hook 270 and the hole 310 are convenient for assembly and have good bonding force and are not easy to loosen. The hook 270 and the hole 310 are used in conjunction with each other. Under normal use, the hook 270 hooks the upper surface of the anti-overflow valve plate 30 so that the anti-overflow valve plate 30 fits on the surface of the anti-dumping valve 20 and blocks the safety air outlet 240. Under abnormal circumstances, under the action of the air pressure inside the container body 60, the anti-overflow valve plate is forced to deform, the safety air outlet 240 is opened, and the gas can be discharged from the safety air outlet 240 to release the pressure. In addition, after the pressure inside the container body 60 returns to normal pressure, the shape of the anti-overflow valve plate 30 is restored to continue to block the safety air outlet 240, so that it can be used multiple times. In practical applications, the pressure relief valve sheet is optionally a thin plastic sheet, which has the advantages of low cost and convenient processing and production. In addition, since the thinner plastic sheet has good elasticity and can recover to its original shape after being bent, it can recover to its original shape in time after being opened by steam and continue to block the insurance air outlet 240, so it has high reliability and long service life. In some embodiments, as shown in FIGS. 3, 4, 10 and 11, a protrusion 250 protruding downward is provided on the bottom surface of the anti-dump valve 20, and a side of the protrusion 250 has an air guide port 260, which connects the steam inlet 120 and the safety air inlet 220. In this way, the protrusion 250 is located between the lower cover 10 and the bottom surface of the anti-dump valve 20, which can support the anti-dump valve 20 and prevent the bottom surface of the anti-dump valve 20 from directly contacting the lower cover 10, resulting in the safety air inlet 220 on the bottom surface of the anti-dump valve 20 being blocked; and the air guide port 260 is provided on the side of the protrusion 250 to connect the steam inlet 120 and the safety air inlet 220, which simplifies the structure and facilitates the setting. In practical applications, optionally, there are multiple protrusions 250, and multiple protrusions 250 can stably support the bottom surface of the anti-dumping valve 20. Further, there is a gap between two adjacent protrusions 250, and the gap is used as an air guide 260 to connect the steam inlet 120 and the safety air inlet 220. In some embodiments, as shown in Figures 3 and 4, the steam inlet 120 and the safety air inlet 220 are staggered in the horizontal direction. In this way, when the liquid heating container is dumped, the impact force of the water inside the container body 60 will not directly act on the safety air inlet 220 via the steam inlet 120, so that it can be avoided that at the moment when the liquid heating container is dumped, the steam inlet 120 and the safety air inlet 220 are staggered in the horizontal direction. The impact force generated by the shaking of water acts on the anti-overflow valve sheet 30, causing the anti-overflow valve sheet 30 to be opened, thereby ensuring that the anti-overflow valve sheet 30 can block the safety air outlet 240 when the liquid heating container is in a tilted state to prevent liquid from spilling. In some embodiments, as shown in FIG. 7, the steam inlet 120 is located on the bottom wall of the hollow part 111 at a side edge away from the center of the lower cover 10. In this way, the steam inlet 120 is located as close to the outer peripheral edge of the lower cover 10 as possible on the bottom wall of the hollow part 111. In this way, when the liquid heating container is in a tilted state, the anti-dumping valve 20 located on the upper side can be in a higher position, thereby reducing the risk of being submerged by water as much as possible, and then maintaining the passage to ensure that the steam can flow out from the spiral channel, avoiding the danger of the steam inside the container body 60 being unable to be discharged and the pressure being too high, further meeting the needs of the liquid heating container in the anti-dumping state. In some embodiments, as shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5 and FIG. 6, the cover assembly further includes: a middle cover 40, connected to the upper part of the lower cover 10, the lower surface of the middle cover 40 and the lower cover 10 enclose an air guide channel, a steam outlet 410 communicating with the outside is provided on the side wall of the lower cover 10 and/or the middle cover 40, and the air guide channel communicates the spiral channel and the steam outlet 410. In these embodiments, an air guide channel is formed by providing the anti-dumping valve 20 with the lower cover 10 and the middle cover 40, and the steam outlet 410 is provided on the middle cover 40 and/or the lower cover 10, so that the steam discharged from the spiral channel of the anti-dumping valve 20 can flow directly to the steam outlet 410 through the air guide channel, so that the steam can quickly reach the steam outlet 410, and then be discharged from the cover assembly through the steam outlet 410, thereby reducing the time from boiling to the power switch tripping, and also reducing the contact surface of the steam condensation, thereby reducing the generation of condensed water inside the cover assembly. Further, in some embodiments, as shown in FIGS. 1 to 6, the cover assembly further includes an upper cover 50 mounted above the middle cover 40, and the upper cover 50 can cover the components located on the middle cover 40, which is conducive to the cleanliness and appearance of the cover assembly. Further, in some embodiments, as shown in FIGS. 1 to 6, the cover assembly further includes a sealing ring, which is sleeved on the outer periphery of the lower cover 10, and can prevent water from flowing out between the cover assembly and the container body 60, so as to achieve a sealed connection between the cover assembly and the container body 60. According to a second aspect of the present invention, there is provided a liquid heating container, comprising: a container body 60, the top of the container body 60 having an opening 610; and a cover assembly as in any one of the above technical solutions, the cover assembly being arranged at the opening 610. The liquid heating container provided in the embodiment of this aspect has the beneficial effects of any of the above technical solutions due to the cover assembly having any of the above technical solutions, which will not be described one by one here. In some embodiments, as shown in FIGS. 1, 2, 5 and 6, the liquid heating container further comprises a pouring spout 620 and a handle arranged opposite to each other, and a steam switch is arranged in the handle; there are two anti-dumping valves 20, and the two anti-dumping valves 20 are symmetrically arranged along the line between the pouring spout 620 and the handle. In these embodiments, since the handle is used as a fulcrum when the liquid heating container is tipped, two anti-dumping valves 20 are symmetrically arranged on the line between the pouring port 620 and the handle, so that no matter which direction the liquid heating container is tipped, there can be an anti-dumping valve 20 that will not be submerged by the water surface, so that the anti-dumping valve 20 located on the upper side maintains a passage, ensuring that the steam can flow out from the spiral channel, avoiding the danger of the internal steam of the container body 60 being unable to be discharged and the pressure being too high, thereby meeting the requirements of the liquid heating container in the anti-dumping state. Further, a steam switch is provided in the handle, specifically, a container steam outlet 630 is provided on the container body 60, and the container steam outlet 630 is connected to the steam outlet 410, and further connected to the inside of the handle, so that the steam in the cover assembly can flow into the handle via the steam outlet 410 and the container steam outlet 630, condense in the handle or discharge to the outside; further, the steam can trigger the steam switch under certain conditions, avoid abnormal operation of the liquid heating container, prevent dry burning and danger, and improve the safety of the product. Although the embodiments of the present invention have been described in detail above, those skilled in the art may make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the present invention. It should be understood that, in the opinion of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A cover assembly, characterized in that the cover assembly comprises: a lower cover (10), the lower cover (10) having at least two anti-overflow columns (110) protruding upward, the anti-overflow columns (110) being provided with a hollow portion (111) inside, and each of the anti-overflow columns (110) being provided with a steam inlet (120) penetrating the lower cover (10), the steam inlet (120) being communicated with the hollow portion (111); and an anti-dumping valve (20), being provided in the hollow portion (111), one of the outer side wall of the anti-dumping valve (20) and the inner side wall of the hollow portion (111) being provided with a threaded portion (210), and the other being a smooth column, a spiral passage being formed between the threaded portion (210) and the smooth column. road.

2. The cover assembly according to claim 1, wherein the difference between the diameter of the threaded portion (210) and the diameter of the smooth column ranges from -0.5 mm to 0.5 mm.

3. The cover assembly according to claim 1 or 2, wherein the threaded portion (210) is provided on the outer wall of the anti-dumping valve (20), and the inner wall of the hollow portion (111) is the smooth column.

4. A cover assembly according to any one of claims 1 to 3, wherein the threaded portion (210) comprises a thread extending along the anti-dump valve

The threaded portion (210) is wound multiple times in the height direction of the anti-dump valve (20); or the threaded portion (210) includes a plurality of threads, and the plurality of threads are arranged in parallel and wound multiple times in the height direction of the anti-dump valve (20).

5. The cover assembly according to any one of claims 1 to 3, wherein the cover assembly further comprises: an anti-overflow valve sheet (30), the anti-dumping valve (20) is provided with a safety air inlet (220), a safety air outlet (240) and a safety channel (230) connecting the safety air inlet (220) and the safety air outlet (240), the safety air inlet (220) is connected to the steam inlet (120), and the anti-overflow valve sheet (30) blocks the safety air outlet (240); wherein, when the pressure inside the container body (60) is greater than a set threshold, The pressure can open the anti-overflow valve plate (30).

6. The cover assembly according to claim 5, wherein a fixing portion is provided at the top of the anti-dumping valve (20), and the anti-overflow valve plate

A matching portion is provided on the anti-overflow valve (30), and the fixing portion and the matching portion cooperate with each other so that the anti-overflow valve plate (30) is connected to the top end of the anti-dumping valve (20).

7. The cover assembly according to claim 6, wherein the fixing portion is a hook (270), the matching portion is a hook hole (310), and the hook (270) passes through the hook hole (310) and is capable of hooking the upper surface of the anti-overflow valve plate (30), so that the anti-overflow valve plate (30) is attached to the surface of the anti-dumping valve (20).

8. The cover assembly according to any one of claims 5 to 7, wherein a protrusion protruding downward is provided on the bottom surface of the anti-dumping valve (20).

(250), a side portion of the protruding portion (250) has an air guide port (260), and the air guide port (260) is connected to the steam inlet (120) and the safety air inlet (220).

9. The cover assembly according to any one of claims 5 to 8, wherein the steam inlet (120) and the safety air inlet (220) are arranged to be offset in a horizontal direction.

10. The cover assembly according to claim 9, wherein the steam inlet (120) is located on an edge of a side of the bottom wall of the hollow portion (111) away from the center of the lower cover (10).

11. A cover assembly according to any one of claims 1 to 10, wherein the cover assembly further comprises: a middle cover (40) connected to the upper part of the lower cover (10), an air guide channel being formed between a lower surface of the middle cover (40) and the lower cover (10), a steam outlet (410) communicating with the outside being provided on a side wall of the lower cover (10) and/or the middle cover (40), and the air guide channel communicating with the spiral channel and the steam outlet (410).

12. A liquid heating container, characterized in that it comprises: a container body (60), the top of the container body (60) having an opening (610); and a cover assembly according to any one of claims 1 to 11, the cover assembly covering Located at the opening (610).

13. A liquid heating container according to claim 12, wherein the liquid heating container further comprises a water pouring spout (620) and a handle arranged opposite to each other, a steam switch is arranged in the handle, and the steam in the cover assembly can flow into the handle; the number of the anti-dumping valves (20) is two, and the two anti-dumping valves (20) are symmetrically arranged along the line between the water pouring spout (620) and the handle.

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